A good reason for studying the subject of commercial space travel is because most people, when asked, say that they would like to take a flight to orbit. Normal commercial industries, when they discover a service that is apparently so popular with the public, make considerable efforts to commercialize it. However, to date, this desire has had little influence on the space industry, which performs almost exclusively government activities.

References:

Sanger II, an advanced launcher system for Europe

Acta Astronautica

Slide Rule

Advances in the Astronautical Sciences

Development organization and safety design environment of space transport system